Random Weirdness

Several weeks ago I was commuting on the 210 fwy when I started to lanesplit next to a city bus that was in the #1 lane. Just as I started to go by, the driver suddenly put on the left-turn blinker and swung onto the left shoulder. I thought something must be wrong. Nope, he just wanted to get by some of the traffic. He traveled on the shoulder for about a mile before swinging back into the #1 lane. Odd.